21 replies to this topic

[Alastair]

Has anyone looked at whether a brembo 4 pot will fit?

MGF TF 4 pot AP calipers had a fair bit of engineering to fit, the Brembo from multiple renault sport and seat Leon's are 130mm radial mounts which is the same as the AP caliper.

Alfa 304mm discs are also 5 x 110 fitting.. I cant see any info on the offsets yet.

A long shot I know, but this would be a cheap 4 pot upgrade if the sizes worked

[2-20]

Alfa 304mm discs are also 5 x 110 fitting.. I cant see any info on the offsets yet.

For discs there is also the corsa D nurburgring ones. They are 305 dia.
You will need to resurface them to go from 28 to 25 mm thick. When resurfaced they are about 7 kg so less than OEM.
There are also Brembo calipers on the Corsa Nurburgring but i know nothing about them...

[Rosssco]

Why do you want 4-pots?

 

They will be heavier than the OEM caliper (which is about as light as you can reasonably get), you'll need to fully 'engineer' it along with cost and bespoke parts, and then there's the increasing the front bias (which isn't really desirable..). As a few on here have found, a larger front caliper doesn't typically translate to better braking. Worse in some cases unless a corresponding larger master cylinder is used to account for a larger fluid volume.

 

You might be better just fitting the larger diameter brake discs and spacing the AP caliper out. Downsides are weight, roational mass, and more front bias again.

[Alastair]

i wasn't desperate for 4 pots, i just saw a pair of new "old stock" 130mm radial Brembos for £250 and wondered if i could make it work - i still think they would bolt on and could use off the shelf discs. 

 

I suspect i need to get my front calipers refurbished, so man maths was making me wonder if this was a different option for me for the same sort of money

[TFD]

I started working on this about three weeks ago. Even made a specsheet with all the stuff.

Only thing I need to know right now is the offset between the 130mm mounting (centre of the hole) holes and the centre of the brakedisc for the vx220 OEM 2-pot front setup.

 

Keep you updated.

[TFD]

Here is the AP racing 4-pot drawing, but I'm to stupid to find the offset...

 

http://file:///C:/Us...d - Sheet1.pdf

[smiley]

And to stupid to know the difference between local storage and the old interweb.

[TFD]

Jup....

 

27.5mm it seems to be. Just to lazy to get to my VX and meassure it up for a check.

 

But hejj.... I'm working right now, so all from the top of my head.

[smiley]

You need to book Zandvoort, and stop mucking around on brakes.

Buy RC6 pads, top off with motull 660 and you're done.

 

[TFD]

Ok....

Can I make it my next winter project please?

[smiley]

Yes you can. Make sure to this one. Pretty good.

http://www.vx220.org...now-makes-sense

 

[TFD]

iii) Will you only be doing road driving? If you don't intend to go on track there is absolutely no point in going for a 4pot system, other than it does look very cool.

Here you go!

[Alastair]

I started working on this about three weeks ago. Even made a specsheet with all the stuff.

Only thing I need to know right now is the offset between the 130mm mounting (centre of the hole) holes and the centre of the brakedisc for the vx220 OEM 2-pot front setup.

 

Keep you updated.

 

The offset and weight of the AP calipers is on page 44 of this catalogue

 

https://www.ravasico...effe_e_2019.pdf

[Alastair]

More offset data on AP here

https://apracing.com...ke Calipers.pdf

[TFD]

CP5316 & CP5317 calipers

130mm x 27.5mm offset.

41.3mm pistonsize

 

Thanx 

[Eliselee281275]

Yay or Nay
https://www.ebay.co....tm/184161506210

[TFD]

They fit but no idea on offset (trying to find out). Would need spacers I guess.
40mm pistons will muck up your brakebalans with oem rears.

[TFD]

Hi folks,

 

I need some input here. Would this Vectra C 292x20mm brakedisc fit the VX hub? The picture shows some tapered inside and a 174mm hub where the vx has a 150mm, so not sure if it fits:

 

Brembo part# 09.9595.10 (Vectra C rear disc)

 

One benefit is a 2.2kg weightsaving. What's the downside of less material? I suspect less heat dispantion?

 

Thanx for input!

Attached Files

•  OEM 292.jpg   169.92KB   5 downloads
•  OEM 288.jpg   155.81KB   5 downloads

[Rosssco]

Hi folks,
 
I need some input here. Would this Vectra C 292x20mm brakedisc fit the VX hub? The picture shows some tapered inside and a 174mm hub where the vx has a 150mm, so not sure if it fits:
 
Brembo part# 09.9595.10 (Vectra C rear disc)
 
One benefit is a 2.2kg weightsaving. What's the downside of less material? I suspect less heat dispantion?
 
Thanx for input!

 
Less thermal capacity yes, but this is likely only relevant for track driven cars. I doubt on the road this is ever really an issue.

 

A ~2kg weight saving is useful. The thinner disc may require thicker pads (or at least pretty new pads with lots of material).

 

Try some and let us know..

[TFD]

I'm thinking of using Boxster rear calipers on the front. Piston area is simular to the OEM 2-pots so BIAS and BMC should be ok.

The 2.5 and 2.7 Boxsters use 292x20mm disc so hence the question as the vectra C disc looked as a possibility and saving some weight.

 

The Boxster S rears use 24mm discs (same caliper, but more wide padpins).

 

So for now I think:

 

Boxster S rears on the front + brackets

Signum 285x25 disc on all corners (-0,6kg per corner)

CL5+ pads on all corners

Motul 660 fluid

Braided lines